RCS - Cerillion PLC - Achieves "Diamond-level" Open API Certification

CerillionAnnouncement

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RNS Number : 1784Y  Cerillion PLC  26 March 2026

AIM: CER

Cerillion plc

("Cerillion" or "the Company")

Achieves TM Forum "Diamond-level" Open API Certification

with Industry-leading 'Real-world' Deployments

Cerillion, the billing, charging and customer relationship management software
solutions provider is pleased to announce that it has achieved "Diamond-level"
status in TM Forum's Open API Conformance programme, which recognises vendors
that have certified more than 50 Open APIs.

Cerillion has 32 Real World Open API certifications across five live customer
deployments. This means that the Company has the highest number of TM Forum
Real World Open API certifications of any BSS/OSS vendor. Real-world
certifications validate APIs that are proven in operational environments,
rather than tested solely in lab conditions.

While a small number of BSS/OSS vendors have reached Diamond status, Cerillion
leads the market in both the quantity and breadth of its real-world
implementations across multiple customer environments, demonstrating a
repeatable delivery model that reduces risk and delivers predictable,
real-world results.

TM Forum Open APIs are a critical foundation for composable, interoperable
BSS/OSS architectures. However, product certification alone does not guarantee
successful implementation.

Cerillion's approach is differentiated by its API-first architecture, where
Open APIs are embedded natively within its BSS/OSS Suite and underpin all
system functionality - from user interfaces and workflows to integration and
extensibility. This ensures that the same APIs used for certification are
those driving live operations, enabling consistent delivery, seamless
interoperability, and integration with emerging standards such as the Model
Context Protocol (MCP).

Louis Hall, CEO of Cerillion plc, commented:

"Diamond-level status is an important milestone, but the real story is how
those certifications have been achieved. Our API-first approach ensures that
TM Forum Open APIs are built into the core of our solution. The result is not
just compliance, but proven delivery in live customer deployments - giving our
customers real confidence and certainty of outcome."

Enquiries:

 

 Cerillion plc                      c/o KTZ Communications

 Louis Hall, CEO                    T : 020 3178 6378

 KTZ Communications                 T: 020 3178 6378
 Katie Tzouliadis, Robert Morton

 

 

About Cerillion

www.cerillion.com

 

Cerillion has a 26-year track record in providing mission-critical software
for billing, charging and customer relationship management ("CRM"), mainly to
the telecommunications sector but also to other markets, including utilities
and financial services. The Company has c. 70 customer installations across c.
45 countries. Headquartered in London, Cerillion also has operations in India
and Bulgaria as well as a sales presence in Continental Europe, the USA,
Singapore and Australia.

 

The business was originally part of Logica plc before its management buyout,
led by CEO, Louis Hall, in 1999. The Company joined AIM in March 2016.

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